With little hope, left Heath and Mara are forced to separate on two desperate missions to either relocate the remnants of humanity to a new world or cleanse Earth of the infestation of Feeder aliens. On the road to the Feeders' home world, to seek the monsters' natural predator, Heath finds himself facing the consequences for deeds committed by humanity years before. On the other side of the galaxy the motivations for Mara's treachery hold dire consequences for Charlotte and the new Fear Agents.